My Inquiry
My Account
Diodes Incorporated SMF4L54A-7
- Part No.:
- SMF4L54A-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-219AA
- Datasheet:
-
SMF4L54A-7.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:3,409
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMF4L54A-7 from Diodes Incorporated is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode with a 54V working peak reverse voltage, 60–66.3V breakdown range at 1mA, and 87.1A maximum peak pulse current (10/1000µs waveform). It clamps to ≤87.1V under surge, delivers ±30kV ESD protection per IEC61000-4-2, and is used for overvoltage protection on automotive battery lines and power management rails.
For engineers reviewing the SMF4L54A-7 datasheet, SMF4L54A-7 pinout, SMF4L54A-7 application, or SMF4L54A-7 equivalent, key selection criteria include clamping voltage (VC = 87.1V), standoff voltage (VRWM = 54V), unidirectional polarity, DO-219AA package footprint, and AEC-Q qualified variants for automotive systems requiring robust surge immunity.
Technical Context
This TVS operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds its 60–66.3V breakdown threshold. Its fast response (<1.0ns from 0V to VBR) ensures suppression of sub-nanosecond ESD transients before downstream ICs are damaged.
Designed for high-reliability DC power line protection, it sustains 400W peak pulse power (10/1000µs), handles up to 40A non-repetitive forward surge, and maintains <0.5µA leakage at 54V - enabling low-power system compatibility without standby current penalty.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 54V - Maximum continuous reverse operating voltage before clamping begins; sets safe margin above nominal 48V automotive rail. |
| VBR (min/max) | 60V / 66.3V @ 1mA - Confirmed avalanche onset range; ensures predictable turn-on across temperature and unit variation. |
| VC (max) | 87.1V @ IPP = 87.1A - Clamped voltage during worst-case 10/1000µs surge; defines maximum stress seen by protected circuitry. |
| IPP (max) | 87.1A - Peak surge current capability under standardized 10/1000µs waveform; validates protection against ISO 7637-2 Pulse 5a/b. |
| ESD Rating | ±30kV air / ±30kV contact (IEC61000-4-2) - Full-system ESD immunity without external shielding or layout mitigation. |
| Leakage (IR) | ≤0.5µA @ VRWM - Negligible standby current draw; avoids battery drain in always-on automotive modules. |
| Package | DO-219AA - 2.8mm × 1.9mm surface-mount outline with cathode band marking; compatible with standard SMT reflow profiles. |
Pinout & Package
DO-219AA package: ultra-compact, flat-lead surface-mount outline with molded green compound (UL 94V-0), matte tin-plated copper alloy leads, and cathode band denoting unidirectional polarity. Weight: 0.016g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to protected line (e.g., battery +); conducts only during forward surge or fault conditions. |
| Cathode | Avalanche clamping node | Connected to ground or lower-potential reference; sinks surge current into return path during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 400W peak pulse power (10/1000µs) | Validates compliance with ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 surge immunity requirements. |
| Fast response time <1.0ns | Prevents ESD-induced latch-up or gate oxide damage in sensitive MCU/ASIC inputs before protection activates. |
| RoHS-compliant, halogen-free "Green" construction | Meets automotive OEM material declarations (e.g., GMW3172, Ford WSS-M99P9999-A1) and EU environmental mandates. |
| JEDEC-qualified high-reliability process | Ensures stable parametric performance over -55°C to +175°C operating range and extended lifetime in under-hood environments. |
Applications
| Automotive Battery Protection | Industrial Power Supply Input |
|---|---|
Use Scenario: Protecting 48V mild-hybrid battery management system (BMS) input from load dump transients and jump-start surges. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed directly at connector entry point to shunt energy before DC-DC converter input stage. Use Value: Limits voltage excursion to ≤87.1V during 120V/200ms load dump, preventing overvoltage shutdown or MOSFET avalanche failure in upstream regulators. | Use Scenario: Safeguarding programmable logic controller (PLC) 24V DC input terminals against induced lightning surges and relay coil flyback. IC Role / Device Role / Timing Role: Primary surge suppression element mounted adjacent to terminal block, coordinated with upstream fuse and downstream filter capacitors. Use Value: Absorbs 400W transient energy within 10/1000µs, maintaining downstream 24V rail integrity without triggering overvoltage lockout in microcontroller supervisors. |
| USB-C Power Delivery Line | Telecom PoE Interface |
Use Scenario: Guarding USB-C VBUS line in automotive infotainment head units against hot-plug ESD and cable coupling noise. IC Role / Device Role / Timing Role: First-line ESD suppressor placed between connector and USB PD controller, leveraging ultra-low capacitance and fast response. Use Value: Delivers ±30kV contact ESD immunity while adding <0.5pF parasitic capacitance - preserving signal integrity for 5Gbps USB 3.2 Gen2 data lanes. | Use Scenario: Protecting IEEE 802.3bt Type 4 (90W) Power over Ethernet (PoE) injector output ports from lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Paired unidirectional TVS on each DC pair (spare pairs unused), referenced to isolated secondary ground. Use Value: Clamps differential surges to <90V while sustaining 87.1A peak current, ensuring PoE switch ICs remain within absolute maximum ratings during field-deployed surge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ54A | Same VRWM (54V), but SMA package (larger footprint, higher RθJA = 110°C/W vs. 96°C/W) | Lower power density; less suitable for space-constrained automotive modules | Select if legacy PCB layout requires SMA footprint or thermal derating allows larger thermal pad area. |
| SMF4L54CA | Bi-directional variant; identical VRWM, VBR, VC, and IPP specs | Supports AC-coupled or bidirectional signal lines (e.g., CAN bus, RS-485), not DC power rails | Choose only when protecting symmetrical signals; avoid on unidirectional power paths due to unnecessary reverse conduction risk. |
Compared with SMAJ54A and SMF4L54CA, SMF4L54A-7 offers superior power density in DO-219AA, optimal thermal resistance for compact automotive designs, and unidirectional optimization for DC power line protection - making it the preferred choice where board space and precise polarity control are critical.
Availability
SMF4L54A-7 is available at Aetrix Electronics and suitable for automotive battery protection, industrial PLC power inputs, USB-C PD interfaces, and telecom PoE injectors requiring stable component supply across production lifecycles.
Supply support for SMF4L54A-7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability protection, power management, and signal integrity solutions for automotive, industrial, and computing markets.
The SMF4L series belongs to Diodes' high-power TVS portfolio, engineered specifically for AEC-Q qualified automotive applications and demanding industrial environments where compact size, low leakage, and repeatable clamping performance are mandatory.
FAQ
What is the maximum clamping voltage of SMF4L54A-7 under a 10/1000µs surge?
The maximum clamping voltage (VC) is 87.1V at 87.1A peak pulse current, measured per the 10/1000µs waveform defined in IEC 61000-4-5. This value is guaranteed across the full operating temperature range (-55°C to +175°C) and represents the upper limit of voltage imposed on protected circuitry during worst-case surge events.
Is SMF4L54A-7 qualified for automotive use per AEC-Q200?
No - SMF4L54A-7 is a commercial-grade part. For automotive qualification, Diodes offers the Q-suffix variant SMF4L54AQ-7, which is AEC-Q200 certified, manufactured in IATF 16949 facilities, and supports PPAP documentation. The base part lacks change control and automotive-specific reliability testing.
How does the DO-219AA package compare thermally to SMA or SMC packages?
DO-219AA has a junction-to-ambient thermal resistance (RθJA) of 96°C/W on a 1"×1" FR-4 board with 2 oz. copper, versus 110°C/W for SMAJ54A (SMA) and 60°C/W for SMCJ54A (SMC). While smaller than SMA, DO-219AA achieves better thermal performance than SMA due to optimized leadframe geometry and solder joint thermal path - making it ideal for high-density automotive PCBs.
Can SMF4L54A-7 be used in bidirectional signal lines like CAN or RS-485?
No - SMF4L54A-7 is unidirectional and will conduct continuously if reverse-biased beyond VRWM, risking thermal runaway on AC or bidirectional lines. For such applications, use the bi-directional variant SMF4L54CA, which features symmetric clamping and no cathode band marking, enabling safe operation across both polarities.
SMF4L54A-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-219AA
- Series:
- SMF4L
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 54V
- Voltage - Breakdown (Min):
- 60V
- Voltage - Clamping (Max) @ Ipp:
- 87.1V
- Current - Peak Pulse (10/1000µs):
- 4.6A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AA
SMF4L54A-7 FAQ
1.How can I place an order for SMF4L54A-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF4L54A-7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SMF4L54A-7 reliable?
The price and inventory of SMF4L54A-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF4L54A-7 is usually 5 days.
3.What payment methods are accepted for SMF4L54A-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF4L54A-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF4L54A-7?
SMF4L54A-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF4L54A-7 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SMF4L54A-7?
For technical support, including SMF4L54A-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF4L54A-7 requirements.
6.How does Aetrix verify that SMF4L54A-7 is sourced from the original manufacturer or authorized distributors?
All SMF4L54A-7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMF4L54A-7 meets industry standards.
7.What is the process for return or replacement of SMF4L54A-7?
All SMF4L54A-7 units undergo pre-shipment inspection (PSI). If there is an issue with SMF4L54A-7, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SMF4L54A-7 part is unused and in its original packaging.
Return procedure for SMF4L54A-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF4L54A-7 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
